Finding the Fourth Proportional to 67,200.75, 100,807.43 and 19,815.89

Step by Step Solution

1. Step 1: Write the proportion equation
   67,200.75 : 100,807.43 = 19,815.89 : x
2. Step 2: Convert to fraction form
   67,200.75/100,807.43 = 19,815.89/x
3. Step 3: Cross multiply
   67,200.75x = 100,807.43 × 19,815.89
4. Step 4: Simplify right side
   67,200.75x = 1,997,588,340.95
5. Step 5: Solve for x
   x = 1,997,588,340.95/67,200.75
6. Step 6: Final answer
   x = 29,725.69